Gripper support attachment



FIG. 1 is a top, front perspective view of our new design for a gripper support attachment;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

The broken lines shown in the show portions of the gripper support attachment which form no part of the claimed design. 

CLAIM The ornamental design for a gripper support attachment, as shown and described. 